clutch / alignment / tires?
Posted: Sun Jan 07, 2007 11:21 am
I wouldn't normally make much of it, but I'm noticing three things that seem to be related.
First, for the last couple days, we've been smelling clutch. Not upon shifting, but rather while underway. At first, I thought it was somebody's ATF, or maybe even our brakes, but since it's persisted for the last few days, it seems to be us.
Second, both Sandy and I have lost traction in the last 24 hours, on the same kind of turn, a 90° left-hander, and at the same speed, 35-45mph. For her, she was in 4th, and had understeer, I was in 3rd, and had oversteer. But, given the same speed, and the same direction, I think I can safely assume the difference between over/under steer in this case is the difference in torque between 3rd and 4th (consider the RPM range difference given a similar speed). I had to correct for oversteer, she had to correct for understeer. This is, of course, an AWD car, so it's weird that we would have different reactions.
Third, the car seems to be a little mis-aligned, tending a little bit to the left. This seems to me to indicate that on a turn a little too "hot," the car might not behave as expected. I've certainly had the car in hard left-handers above 110mph, and not noticed anything odd until recently. We're at 9500 miles, and just had our tires rotated at 7500 miles (we were looking at houses, so put a ton of miles on the car in the last few weeks, without really "driving" the car). Is it possible that during the rotation we encountered some alignment mis-geometry?
Since we've both lost traction in the last 24 hours (and not before), is it possible that it's road conditions? They're mostly dry in Arlington, and the roads were the same (mostly dry asphalt). The only thing I can think of is that it's been cold-ish lately, with the last day or so being 70°F+. The tires are of course the stock tires.
I kind of think it might be a good idea to get the rear cambered out a little, and maybe to get some "real" summer tires (yes, I know, everyone has wood for the stock tires, but I'm thinking something along the lines of KV710 or YA032R). It kind of worries me. Since we're at 9500, and oil is due to be changed on Tues/Weds, I am considering just asking Don Beyer to have a look at the alignment, and if everything is in order, to dial in maybe 1-2° of negative camber out back. I'm not sure what to make of the clutch smell. Is it possible that a wonky alignment could lead to clutch mis-engagement? I haven't heard of such a thing, but then this is the first three-LSD vehicle I've owned. Is it possible that one of the differentials is unhappy? Don Beyer made a huge stink about getting the car in to have the tires rotated at 7500mi, saying if we didn't that we might throw a transmission.
Ideas?
First, for the last couple days, we've been smelling clutch. Not upon shifting, but rather while underway. At first, I thought it was somebody's ATF, or maybe even our brakes, but since it's persisted for the last few days, it seems to be us.
Second, both Sandy and I have lost traction in the last 24 hours, on the same kind of turn, a 90° left-hander, and at the same speed, 35-45mph. For her, she was in 4th, and had understeer, I was in 3rd, and had oversteer. But, given the same speed, and the same direction, I think I can safely assume the difference between over/under steer in this case is the difference in torque between 3rd and 4th (consider the RPM range difference given a similar speed). I had to correct for oversteer, she had to correct for understeer. This is, of course, an AWD car, so it's weird that we would have different reactions.
Third, the car seems to be a little mis-aligned, tending a little bit to the left. This seems to me to indicate that on a turn a little too "hot," the car might not behave as expected. I've certainly had the car in hard left-handers above 110mph, and not noticed anything odd until recently. We're at 9500 miles, and just had our tires rotated at 7500 miles (we were looking at houses, so put a ton of miles on the car in the last few weeks, without really "driving" the car). Is it possible that during the rotation we encountered some alignment mis-geometry?
Since we've both lost traction in the last 24 hours (and not before), is it possible that it's road conditions? They're mostly dry in Arlington, and the roads were the same (mostly dry asphalt). The only thing I can think of is that it's been cold-ish lately, with the last day or so being 70°F+. The tires are of course the stock tires.
I kind of think it might be a good idea to get the rear cambered out a little, and maybe to get some "real" summer tires (yes, I know, everyone has wood for the stock tires, but I'm thinking something along the lines of KV710 or YA032R). It kind of worries me. Since we're at 9500, and oil is due to be changed on Tues/Weds, I am considering just asking Don Beyer to have a look at the alignment, and if everything is in order, to dial in maybe 1-2° of negative camber out back. I'm not sure what to make of the clutch smell. Is it possible that a wonky alignment could lead to clutch mis-engagement? I haven't heard of such a thing, but then this is the first three-LSD vehicle I've owned. Is it possible that one of the differentials is unhappy? Don Beyer made a huge stink about getting the car in to have the tires rotated at 7500mi, saying if we didn't that we might throw a transmission.
Ideas?